| 4GAM: reference: Control of substrate access to the active site in methane monooxygenase., Lee SJ, McCormick MS, Lippard SJ, Cho US, Nature. 2013 Feb 21;494(7437):380-4. doi: 10.1038/nature11880. Epub 2013 Feb 10. PMID: 23395959 |
This OCA 
Structure page
uses Jmol,
developed by the Jmol Development Team
(documentation).